Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/api/quicdatachannel.cc

Index: webrtc/api/quicdatachannel.cc
diff --git a/webrtc/api/quicdatachannel.cc b/webrtc/api/quicdatachannel.cc
deleted file mode 100644
index 2ab2a3444fa6ee52c2771154a5598ab773fd0d31..0000000000000000000000000000000000000000
--- a/webrtc/api/quicdatachannel.cc
+++ /dev/null
@@ -1,396 +0,0 @@
-/*
- *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/api/quicdatachannel.h"
-
-#include "webrtc/base/bind.h"
-#include "webrtc/base/bytebuffer.h"
-#include "webrtc/base/copyonwritebuffer.h"
-#include "webrtc/base/logging.h"
-#include "webrtc/p2p/quic/quictransportchannel.h"
-#include "webrtc/p2p/quic/reliablequicstream.h"
-
-namespace webrtc {
-
-void WriteQuicDataChannelMessageHeader(int data_channel_id,
-                                       uint64_t message_id,
-                                       rtc::CopyOnWriteBuffer* header) {
-  RTC_DCHECK(header);
-  // 64-bit varints require at most 10 bytes (7*10 == 70), and 32-bit varints
-  // require at most 5 bytes (7*5 == 35).
-  size_t max_length = 15;
-  rtc::ByteBufferWriter byte_buffer(nullptr, max_length,
-                                    rtc::ByteBuffer::ByteOrder::ORDER_HOST);
-  byte_buffer.WriteUVarint(data_channel_id);
-  byte_buffer.WriteUVarint(message_id);
-  header->SetData(byte_buffer.Data(), byte_buffer.Length());
-}
-
-bool ParseQuicDataMessageHeader(const char* data,
-                                size_t len,
-                                int* data_channel_id,
-                                uint64_t* message_id,
-                                size_t* bytes_read) {
-  RTC_DCHECK(data_channel_id);
-  RTC_DCHECK(message_id);
-  RTC_DCHECK(bytes_read);
-
-  rtc::ByteBufferReader byte_buffer(data, len, rtc::ByteBuffer::ORDER_HOST);
-  uint64_t dcid;
-  if (!byte_buffer.ReadUVarint(&dcid)) {
-    LOG(LS_ERROR) << "Could not read the data channel ID";
-    return false;
-  }
-  *data_channel_id = dcid;
-  if (!byte_buffer.ReadUVarint(message_id)) {
-    LOG(LS_ERROR) << "Could not read message ID for data channel "
-                  << *data_channel_id;
-    return false;
-  }
-  size_t remaining_bytes = byte_buffer.Length();
-  *bytes_read = len - remaining_bytes;
-  return true;
-}
-
-QuicDataChannel::QuicDataChannel(rtc::Thread* signaling_thread,
-                                 rtc::Thread* worker_thread,
-                                 rtc::Thread* network_thread,
-                                 const std::string& label,
-                                 const DataChannelInit& config)
-    : signaling_thread_(signaling_thread),
-      worker_thread_(worker_thread),
-      network_thread_(network_thread),
-      id_(config.id),
-      state_(kConnecting),
-      buffered_amount_(0),
-      next_message_id_(0),
-      label_(label),
-      protocol_(config.protocol) {}
-
-QuicDataChannel::~QuicDataChannel() {}
-
-void QuicDataChannel::RegisterObserver(DataChannelObserver* observer) {
-  RTC_DCHECK(signaling_thread_->IsCurrent());
-  observer_ = observer;
-}
-
-void QuicDataChannel::UnregisterObserver() {
-  RTC_DCHECK(signaling_thread_->IsCurrent());
-  observer_ = nullptr;
-}
-
-bool QuicDataChannel::Send(const DataBuffer& buffer) {
-  RTC_DCHECK(signaling_thread_->IsCurrent());
-  if (state_ != kOpen) {
-    LOG(LS_ERROR) << "QUIC data channel " << id_
-                  << " is not open so cannot send.";
-    return false;
-  }
-  return network_thread_->Invoke<bool>(
-      RTC_FROM_HERE, rtc::Bind(&QuicDataChannel::Send_n, this, buffer));
-}
-
-bool QuicDataChannel::Send_n(const DataBuffer& buffer) {
-  RTC_DCHECK(network_thread_->IsCurrent());
-
-  // Encode and send the header containing the data channel ID and message ID.
-  rtc::CopyOnWriteBuffer header;
-  WriteQuicDataChannelMessageHeader(id_, ++next_message_id_, &header);
-  RTC_DCHECK(quic_transport_channel_);
-  cricket::ReliableQuicStream* stream =
-      quic_transport_channel_->CreateQuicStream();
-  RTC_DCHECK(stream);
-
-  // Send the header with a FIN if the message is empty.
-  bool header_fin = (buffer.size() == 0);
-  rtc::StreamResult header_result =
-      stream->Write(header.data<char>(), header.size(), header_fin);
-
-  if (header_result == rtc::SR_BLOCK) {
-    // The header is write blocked but we should try sending the message. Since
-    // the ReliableQuicStream queues data in order, if the header is write
-    // blocked then the message will be write blocked. Otherwise if the message
-    // is sent then the header is sent.
-    LOG(LS_INFO) << "Stream " << stream->id()
-                 << " header is write blocked for QUIC data channel " << id_;
-  } else if (header_result != rtc::SR_SUCCESS) {
-    LOG(LS_ERROR) << "Stream " << stream->id()
-                  << " failed to write header for QUIC data channel " << id_
-                  << ". Unexpected error " << header_result;
-    return false;
-  }
-
-  // If the message is not empty, then send the message with a FIN.
-  bool message_fin = true;
-  rtc::StreamResult message_result =
-      header_fin ? header_result : stream->Write(buffer.data.data<char>(),
-                                                 buffer.size(), message_fin);
-
-  if (message_result == rtc::SR_SUCCESS) {
-    // The message is sent and we don't need this QUIC stream.
-    LOG(LS_INFO) << "Stream " << stream->id()
-                 << " successfully wrote message for QUIC data channel " << id_;
-    stream->Close();
-    return true;
-  }
-  // TODO(mikescarlett): Register the ReliableQuicStream's priority to the
-  // QuicWriteBlockedList so that the QUIC session doesn't drop messages when
-  // the QUIC transport channel becomes unwritable.
-  if (message_result == rtc::SR_BLOCK) {
-    // The QUIC stream is write blocked, so the message is queued by the QUIC
-    // session. If this is due to the QUIC not being writable, it will be sent
-    // once QUIC becomes writable again. Otherwise it may be due to exceeding
-    // the QUIC flow control limit, in which case the remote peer's QUIC session
-    // will tell the QUIC stream to send more data.
-    LOG(LS_INFO) << "Stream " << stream->id()
-                 << " message is write blocked for QUIC data channel " << id_;
-    SetBufferedAmount_w(buffered_amount_ + stream->queued_data_bytes());
-    stream->SignalQueuedBytesWritten.connect(
-        this, &QuicDataChannel::OnQueuedBytesWritten);
-    write_blocked_quic_streams_[stream->id()] = stream;
-    // The QUIC stream will be removed from |write_blocked_quic_streams_| once
-    // it closes.
-    stream->SignalClosed.connect(this,
-                                 &QuicDataChannel::OnWriteBlockedStreamClosed);
-    return true;
-  }
-  LOG(LS_ERROR) << "Stream " << stream->id()
-                << " failed to write message for QUIC data channel " << id_
-                << ". Unexpected error: " << message_result;
-  return false;
-}
-
-void QuicDataChannel::OnQueuedBytesWritten(net::QuicStreamId stream_id,
-                                           uint64_t queued_bytes_written) {
-  RTC_DCHECK(worker_thread_->IsCurrent());
-  SetBufferedAmount_w(buffered_amount_ - queued_bytes_written);
-  const auto& kv = write_blocked_quic_streams_.find(stream_id);
-  if (kv == write_blocked_quic_streams_.end()) {
-    RTC_NOTREACHED();
-    return;
-  }
-  cricket::ReliableQuicStream* stream = kv->second;
-  // True if the QUIC stream is done sending data.
-  if (stream->fin_sent()) {
-    LOG(LS_INFO) << "Stream " << stream->id()
-                 << " successfully wrote data for QUIC data channel " << id_;
-    stream->Close();
-  }
-}
-
-void QuicDataChannel::SetBufferedAmount_w(uint64_t buffered_amount) {
-  RTC_DCHECK(worker_thread_->IsCurrent());
-  buffered_amount_ = buffered_amount;
-  invoker_.AsyncInvoke<void>(
-      RTC_FROM_HERE, signaling_thread_,
-      rtc::Bind(&QuicDataChannel::OnBufferedAmountChange_s, this,
-                buffered_amount));
-}
-
-void QuicDataChannel::Close() {
-  RTC_DCHECK(signaling_thread_->IsCurrent());
-  if (state_ == kClosed || state_ == kClosing) {
-    return;
-  }
-  LOG(LS_INFO) << "Closing QUIC data channel.";
-  SetState_s(kClosing);
-  worker_thread_->Invoke<void>(RTC_FROM_HERE,
-                               rtc::Bind(&QuicDataChannel::Close_w, this));
-  SetState_s(kClosed);
-}
-
-void QuicDataChannel::Close_w() {
-  RTC_DCHECK(worker_thread_->IsCurrent());
-  for (auto& kv : incoming_quic_messages_) {
-    Message& message = kv.second;
-    cricket::ReliableQuicStream* stream = message.stream;
-    stream->Close();
-  }
-
-  for (auto& kv : write_blocked_quic_streams_) {
-    cricket::ReliableQuicStream* stream = kv.second;
-    stream->Close();
-  }
-}
-
-bool QuicDataChannel::SetTransportChannel(
-    cricket::QuicTransportChannel* channel) {
-  RTC_DCHECK(signaling_thread_->IsCurrent());
-
-  if (!channel) {
-    LOG(LS_ERROR) << "|channel| is NULL. Cannot set transport channel.";
-    return false;
-  }
-  if (quic_transport_channel_) {
-    if (channel == quic_transport_channel_) {
-      LOG(LS_WARNING) << "Ignoring duplicate transport channel.";
-      return true;
-    }
-    LOG(LS_ERROR) << "|channel| does not match existing transport channel.";
-    return false;
-  }
-
-  quic_transport_channel_ = channel;
-  LOG(LS_INFO) << "Setting QuicTransportChannel for QUIC data channel " << id_;
-  DataState data_channel_state = worker_thread_->Invoke<DataState>(
-      RTC_FROM_HERE, rtc::Bind(&QuicDataChannel::SetTransportChannel_w, this));
-  SetState_s(data_channel_state);
-  return true;
-}
-
-DataChannelInterface::DataState QuicDataChannel::SetTransportChannel_w() {
-  RTC_DCHECK(worker_thread_->IsCurrent());
-  quic_transport_channel_->SignalReadyToSend.connect(
-      this, &QuicDataChannel::OnReadyToSend);
-  quic_transport_channel_->SignalClosed.connect(
-      this, &QuicDataChannel::OnConnectionClosed);
-  if (quic_transport_channel_->writable()) {
-    return kOpen;
-  }
-  return kConnecting;
-}
-
-void QuicDataChannel::OnIncomingMessage(Message&& message) {
-  RTC_DCHECK(network_thread_->IsCurrent());
-  RTC_DCHECK(message.stream);
-  if (!observer_) {
-    LOG(LS_WARNING) << "QUIC data channel " << id_
-                    << " received a message but has no observer.";
-    message.stream->Close();
-    return;
-  }
-  // A FIN is received if the message fits into a single QUIC stream frame and
-  // the remote peer is done sending.
-  if (message.stream->fin_received()) {
-    LOG(LS_INFO) << "Stream " << message.stream->id()
-                 << " has finished receiving data for QUIC data channel "
-                 << id_;
-    DataBuffer final_message(message.buffer, false);
-    invoker_.AsyncInvoke<void>(RTC_FROM_HERE, signaling_thread_,
-                               rtc::Bind(&QuicDataChannel::OnMessage_s, this,
-                                         std::move(final_message)));
-    message.stream->Close();
-    return;
-  }
-  // Otherwise the message is divided across multiple QUIC stream frames, so
-  // queue the data. OnDataReceived() will be called each time the remaining
-  // QUIC stream frames arrive.
-  LOG(LS_INFO) << "QUIC data channel " << id_
-               << " is queuing incoming data for stream "
-               << message.stream->id();
-  incoming_quic_messages_[message.stream->id()] = std::move(message);
-  message.stream->SignalDataReceived.connect(this,
-                                             &QuicDataChannel::OnDataReceived);
-  // The QUIC stream will be removed from |incoming_quic_messages_| once it
-  // closes.
-  message.stream->SignalClosed.connect(
-      this, &QuicDataChannel::OnIncomingQueuedStreamClosed);
-}
-
-void QuicDataChannel::OnDataReceived(net::QuicStreamId stream_id,
-                                     const char* data,
-                                     size_t len) {
-  RTC_DCHECK(network_thread_->IsCurrent());
-  RTC_DCHECK(data);
-  const auto& kv = incoming_quic_messages_.find(stream_id);
-  if (kv == incoming_quic_messages_.end()) {
-    RTC_NOTREACHED();
-    return;
-  }
-  Message& message = kv->second;
-  cricket::ReliableQuicStream* stream = message.stream;
-  rtc::CopyOnWriteBuffer& received_data = message.buffer;
-  // If the QUIC stream has not received a FIN, then the remote peer is not
-  // finished sending data.
-  if (!stream->fin_received()) {
-    received_data.AppendData(data, len);
-    return;
-  }
-  // Otherwise we are done receiving and can provide the data channel observer
-  // with the message.
-  LOG(LS_INFO) << "Stream " << stream_id
-               << " has finished receiving data for QUIC data channel " << id_;
-  received_data.AppendData(data, len);
-  DataBuffer final_message(std::move(received_data), false);
-  invoker_.AsyncInvoke<void>(
-      RTC_FROM_HERE, signaling_thread_,
-      rtc::Bind(&QuicDataChannel::OnMessage_s, this, std::move(final_message)));
-  // Once the stream is closed, OnDataReceived will not fire for the stream.
-  stream->Close();
-}
-
-void QuicDataChannel::OnReadyToSend(cricket::TransportChannel* channel) {
-  RTC_DCHECK(network_thread_->IsCurrent());
-  RTC_DCHECK(channel == quic_transport_channel_);
-  LOG(LS_INFO) << "QuicTransportChannel is ready to send";
-  invoker_.AsyncInvoke<void>(
-      RTC_FROM_HERE, signaling_thread_,
-      rtc::Bind(&QuicDataChannel::SetState_s, this, kOpen));
-}
-
-void QuicDataChannel::OnWriteBlockedStreamClosed(net::QuicStreamId stream_id,
-                                                 int error) {
-  RTC_DCHECK(worker_thread_->IsCurrent());
-  LOG(LS_VERBOSE) << "Write blocked stream " << stream_id << " is closed.";
-  write_blocked_quic_streams_.erase(stream_id);
-}
-
-void QuicDataChannel::OnIncomingQueuedStreamClosed(net::QuicStreamId stream_id,
-                                                   int error) {
-  RTC_DCHECK(network_thread_->IsCurrent());
-  LOG(LS_VERBOSE) << "Incoming queued stream " << stream_id << " is closed.";
-  incoming_quic_messages_.erase(stream_id);
-}
-
-void QuicDataChannel::OnConnectionClosed() {
-  RTC_DCHECK(worker_thread_->IsCurrent());
-  invoker_.AsyncInvoke<void>(RTC_FROM_HERE, signaling_thread_,
-                             rtc::Bind(&QuicDataChannel::Close, this));
-}
-
-void QuicDataChannel::OnMessage_s(const DataBuffer& received_data) {
-  RTC_DCHECK(signaling_thread_->IsCurrent());
-  if (observer_) {
-    observer_->OnMessage(received_data);
-  }
-}
-
-void QuicDataChannel::SetState_s(DataState state) {
-  RTC_DCHECK(signaling_thread_->IsCurrent());
-  if (state_ == state || state_ == kClosed) {
-    return;
-  }
-  if (state_ == kClosing && state != kClosed) {
-    return;
-  }
-  LOG(LS_INFO) << "Setting state to " << state << " for QUIC data channel "
-               << id_;
-  state_ = state;
-  if (observer_) {
-    observer_->OnStateChange();
-  }
-}
-
-void QuicDataChannel::OnBufferedAmountChange_s(uint64_t buffered_amount) {
-  RTC_DCHECK(signaling_thread_->IsCurrent());
-  if (observer_) {
-    observer_->OnBufferedAmountChange(buffered_amount);
-  }
-}
-
-size_t QuicDataChannel::GetNumWriteBlockedStreams() const {
-  return write_blocked_quic_streams_.size();
-}
-
-size_t QuicDataChannel::GetNumIncomingStreams() const {
-  return incoming_quic_messages_.size();
-}
-
-}  // namespace webrtc